Answer :
Answer:
84.1%
Step-by-step explanation:
as seen in the image, the centre of the normal distribution is $101. from here, subtracting 1 standard deviation would take us to $91 (the amount given in the question).
standard deviations have set percentage values (see image 2). $91 occurs at - 1 standard deviation so all percentages above this pay more than $91 for their monthly utility bill.
right of the mean is 50% then an additional 34.1% above the $91 (see image)
50% + 34.1% = 84.1%
this is a little confusing but i hope this makes some sense :) let me know if theres anything i can clarify